Stop



K. T. HOFFMAN.

STOP.

APPLICATION FILED JULY29, 1919.

Patented Oct. 12, 1920.,

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STOP.

APPLICATION FILED IuLY29. 1919.

Patented Oct. 12, 1920.

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UNITED sTATEs PATENT OFFICE.

STOP.

Specification of Letters Patent.

Patented Oct. 12, 1920.

Application led July 29, 1919. Serial No. 313,980.

To all 107mm t may concern:

Be it known that I, KENNETH T. HOFF- MAN, a citizen of the UnitedStates, residing at Mount Vernon, inAv the county of Jefferson and Stateof Illinois, have invented certain new and useful Improvements in Stops,of which the following is a specification.

My invention relates generally to car stops and more particularly to anappliance for use in checking movement of railway cars without danger ofinjury either to the car or surrounding parts, my object being theprovision of a friction stop which may, if desired, be controlled by thecar itself while in movement and thus render it automatic in its action.

A further object is the provision of a car stop which may be arranged atvarious points adjacent the railway tracks at which car stops of thisnature may be either desirable or necessary.

With these general objects in view, my invention resides in the car stopto be now described with respect to the accompanying drawings which forma part of this specilication and in which- Figure 1 is a side elevationshowingthe practical application of my invention;

Fig. 2 is a top plan view of the invention at one side of the track orat one rail;

Fig. 3 is a vertical cross section taken on line 3 3 of Fig. 2;

Fig. 4 is a similar view taken on line 4-4 of Fig. 2;

Fig. 5 is a detail perspective view of the car-carried hook;

Fig. 6 is a detail side view of the automatic trip; and Y Fig. 7 is thetop plan of the parts shown in Fig. 6.

Referring now to these gures, my invention is designed for'operation inconnection with railway cars, one of which is generally indicated at 10in Fig. 1, in order to show the manner in which the invention seeks tofrictionally engage the sides of the car wheels 11. For the purposes ofthe invention frictional gripping members 12 are extended longitudinallyalong the outer sides of the rails 13, in the form of plates, preferablyof metal, either with or without additional gripping Ameans upon theirinner surfaces, these means being hinged by hinges 14, at spaced pointsalong their lower edges, to the ties 15.

The frictional gripping members, which as above stated and as seen inFigs. 3 and 4, are hinged at-their lower ends adjacent to the railbases, and which normally eX- tend outwardly beyond any point ofpossible contact with car wheels upon the rails, are shiftable tovertical or approximately vertical positions where they may engage theside faces of the car wheels. This shifting movement is communicatedthrough longitudinally extending controlling rods 16, preferably ofpolygonal form to obviate rotation, and these controlling rods extendadjacent to the outer faces of the'frictional engaging members 12 andthrough bearing blocks 17 securely fastened upon certain of the tieends. At spaced points the controlling rods 16 have secured theretocontrolling blocks 18, which it will be noted'from Fig. 1 showing theVnormal inoperative positions of the parts, are positioned adjacent thetapering engaging members 19 rigidly secured to the outer side faces ofthe friction plates 12 so that by shifting the controlling rods 16 inthe direction of their length, these controlling blocks may be caused toride the inclined faces of the members 19 so as .to shift the frictionengaging members 12 from the inactive inclined positions'of Fig. 2, tothe active approximately vertical positions of Fig. 3.

Along its upper edge and spaced therefrom, each of the friction engagingplates 12 preferably has a series of curved brackets 20, the upper endsof which are rigidly attached to and support a limiting rail 21, in suchmanner that a longitudinal space remains between the limiting rail andthe upper. rigid edges of the frictional engaging member 12 to providefor the reception of the lower angular extension 22 projecting outwardlyfrom a car-carried bracket 23, such as seen in the detail Fig. 5, theupper portion of which bracket is rigidly secured to a car. Thecar-carried member 23 is thus in the nature of a hook, engageable withthe limiting rail 21 when the frictional engaging plate 12 is in itsvertical operative position so as to avoid all danger of a car ridingupwardly between the opposite frictional gripping plates, due to itsmomentum. In this way I avoid all `danger of derailnie'nt of a car andmaintain the same firmly upon the rails 13, to assist which verticalrigid guard plates-24 may be secured to upstand along the inner sides ofthe rails, as seen particularly in Figs. 2, 3, and 4L.

It is obvious, for the purposes of the invention, the controlling rods1G may, if desired, be manually controlled through any suitableconnection, for instance, from a warehouse platform adjacent to whichthe trip stop may be mounted, or from a switch tower. My inventioncontemplates, however, that the trip stop may be controlledautomatically by means of a car-actuated or shifted trip arm 25, such asseen in Figs. 6 and 7, normally upstanding from a shaft 26, at theopposite ends of which inclined arms 27 project and are pivotallyconnected to pivoted portions 16a of the ends of the side controllingrods 16, each of the said controlling rods having a pivoted pawl or dog28 engaging an arcuate ratchet 29 so as to hold the same in theeffective position to which they may be moved by car engagement andactuation of the trip arm 25.. rlhis trip mechanism, it will beobserved, is similar to, and may be utilized in connect-ion with or as apart of, automatic switchthrowing, if sov desired.

It is obvious from the foregoing that with the frictional grippingplates in the inoperative position shown in Fig. 2, cars may proceedupon the rails 13 without danger of accidental engagement, whereas uponlengthwise shifting movement of the controlling rods 16 these engagingplates may bey moved inwardly to their effective positions,kshown inFig. 3, where they will engage the outer faces of the car wheels belowthe axles, bytheir Vfrictional pressure, andwill gradually bring the carto a stop rendering the invention particularly reffective adjacent towarehouse and factory platforms, as well as in connection ,with what areknown as hump switches.

It is also obvious that my invention as shown and described isparticularly adapted and applicable to mine cars for checking loadedcars under manual control of the eager, adjacent to the mine cage, toprevent .for a time movement onto the cage or accidental movement intothe sump under the cage.. My invention is thus applicable to all railgrades for railways or mines and l wish to be understood as claiming thesame A1n all uses to which it is apparently adapted.

I claim: l. A car stop for use 1n connection with railway railsvcomprising carkwheelsv engaging friction plates hingedly mounted atopposite sides of the rails and along their lower edges, and movable attheir upper edges toward and away from the rails, limiting railsmountedV along the said upper edges ofthe said friction. plates and inspaced relation thereto, andV car-carried means coperating with saidlimiting rails to prevent the car wheels from climbing between thefriction plates, as described.

2. A car stop for railway rails comprising car wheels engaging frictionplates hinged attheir lower ends to tics supporting the rails andmovablel at their upper edges toward and away from the rails, supportingblocks upstanding from spaced rail-supporting ties outwardly beyond thesaid friction plates, a controlling rod having non-rotatable bearingsthrough the said blocks andv disposed parallel' to the said frictionplates, coperating cams carried by the friction plates and the saidcontrolling rod for shifting the former toward the rails and into activeposition upon longitudinal movement of the latter, and means forshifting the said controlling rod, as described.

Y 3. A car stop for railway rails comprising car wheels engagingfriction plates hinged at their lower Vends to ties supporting the railsand movable at their upper edges toward land away from the rails,supporting blocks upstanding from spaced rail-supporting ties outwardlybeyond the said friction plates, a controlling rod having non-rotatablebearings through the said blocks and disposed parallel to the saidfriction plates, coperating meansv carried by the friction plates andthe said controlling rod for shifting the former toward the rails andinto active position upon longitudinal movement of the latter, andcar-actuating means for automatically shifting the said controllingrods, as described.'

4l. A car stop for railway rails comprising car wheels engaging frictionplates hinged at theirlower ends to ties supporting the rails andmovable at their upper edges toward and away from the rails, supportingblocks upstanding from spaced rail-supporting tiesV outwardly beyond thesaid friction plates, a controlling rod having non-rotatable bearingsthrough the said blocks Vand disposed parallel to the said frictionplates, coperating 'meansy carried by the friction plates and the saidcontrolling rod for shifting the former toward the rails and intoacltive position upon longitudinal movement of the latter, andcar-actuating means for automatically shifting the said controllingrods, said last-named means including a trip-shaft having a car-actuatedtrip arm andl provided with arms pivotally c onnectedto the saidcontrolling rods, and means for locking the controlling rods in activeposition, asdescribed.

5. A car Ystop for railway rails comprising car wheels engagingfrictionplates hinged rails and movable at their upper edges toward andaway from the rails, supporting blocksupstanding from spacedrail-supporting ties outwardly beyond the said friction plates, acontrolling rod having non-rotatable bearings through the said blocksand disposed parallel to the said friction plates, cooperating meanscarried by the friction plates and the said controlling rod for shiftingthe former toward the rails and into active position upon longitudinalmovement of the latter, and car-actuating means for automaticallyshifting the said controlling rods, said last-named means including atrip-shaft having a car-actuated trip arm and having arms pivotallyconnected to the said controlling rods, and rigid for holding thecontrolling roes in operative position, as described.

6. :i car stop for railway rails comprising car wheels engaging frictionplates hingedly mounted along their lower edges, parallel with andadjacent to the rails for movement at their upper edges toward and awayfrom the rails, means for shifting said friction plates with respect tothe rails, limiting rails carried by the said friction plates and inspaced relation along the upper edges thereof to form lengthwise slots,and car-carried hook members having lower angular portions arranged toextend into the said slots when the friction plates are in effectivepositions, wherebyto cooperate with the limiting rails and prevent theclimbing of the car wheels between the friction plates.

In testimony whereof I afx my signature.

KENNETH T. v HOFFMAN.

